private Expression BuildFunctorInvokeExpression(AtomMetadata atom, Expression[] args)
{
return atom.MethodTarget == null
? Expression.Call(atom.MethodInfo, args)
: Expression.Call(Expression.Constant(atom.MethodTarget), atom.MethodInfo, args);
}
private Expression BuildFunctorInvokeExpression(AtomMetadata atom, Expression adjustedContext)
{
if (adjustedContext == null)
{
return atom.MethodTarget == null
? Expression.Call(atom.MethodInfo)
: Expression.Call(Expression.Constant(atom.MethodTarget), atom.MethodInfo);
}
return atom.MethodTarget == null
? Expression.Call(atom.MethodInfo, adjustedContext)
: Expression.Call(Expression.Constant(atom.MethodTarget), atom.MethodInfo, adjustedContext);
}
private Expression BuildFunCallExpressionFromMethodInfo(AtomMetadata atom, ParseTreeNode root, CompilerState state)
{
// number of arguments must exactly match number of child nodes in the tree
var paramInfo = atom.MethodInfo.GetParameters();
var funArgs = root.RequireChild("exprList", 1, 0);
funArgs.RequireChildren(paramInfo.Length);
// types and order of arguments must match nodes in the tree
var args = new Expression[paramInfo.Length];
for (var i = 0; i < paramInfo.Length; i++)
{
var param = paramInfo[i];
var argNode = funArgs.ChildNodes[i];
var value = state.ParentRuntime.Analyze(argNode, state);
Expression adjusted;
if (!ExpressionTreeExtensions.TryAdjustReturnType(root, value, param.ParameterType, out adjusted))
{
throw new CompilationException(string.Format("Could not adjust parameter number {0} to invoke function {1}",
i, atom.Name), funArgs.ChildNodes[i]);
}
args[i] = adjusted;
}
return BuildFunctorInvokeExpression(atom, args);
}